Bacillus Calmette-Guerin(BCG) vaccine a live, attenuated strain of Mycobacterium bovis introduced in 1922 o the true efficacy of BCg is unknown Early clinical trials in Europe showed up to 80% protection, but more recent trials in India and africa showed little value
Bacillus Calmette-Guerin (BCG) vaccine • a live, attenuated strain of Mycobacterium bovis introduced in 1922. • the true efficacy of BCG is unknown • Early clinical trials in Europe showed up to 80% protection, but more recent trials in India and Africa showed little value
肺结核自然演变示意图 原性结 限发性结 淋已血道肺内肺外播散(隐性菌血症) 原发性结核 EFR 浸润型肺结核纤维硬结 复发(内源性 愈合 aT 再感染 (外浑性 结核性胸炎亚急性。干酪样肺炎形成空洞 血行嬏散 急性粟粒型肺结核 A 千酪样肺炎 慢性纤維空祸型肺结核 结核性胸朦炎
肺结核自然演变示意图
病因 mycobacterium tuberculosis:koch于1882年从病 人的痰中发现 生长缓慢,繁殖周期14~22hr,最pH74 PO2100~140mmHg,代谢不活跃,生 长繁殖缓慢或停滞,为日后复发根源。 ·分为4型:人型、牛型、鸟型和鼠型,对人有 致病力者主要为人型,其次为牛型(占6% 对酸、碱和酒精等有较强的抵抗力,室内阴暗 潮湿处能存活半年
病因 • mycobactrium tuberculosis由 koch于1882年从病 人的痰中发现 • 生长缓慢，繁殖周期１４～２２hr，最pＨ7.4 ＰO2１００～１４０mmＨg，代谢不活跃，生 长繁殖缓慢或停滞，为日后复发根源。 • 分为４型：人型、牛型、鸟型和鼠型，对人有 致病力者主要为人型，其次为牛型（占６％） • 对酸、碱和酒精等有较强的抵抗力 ，室内阴暗 潮湿处能存活半年
分6 Mycobacterium tuberculosis infection of lung is shown here with numerous red rods seen with acid fast staining
Mycobacterium tuberculosis infection of lung is shown here with numerous red rods seen with acid fast staining
The single strand of the acid fast bacteria, mycobacterium tuberculosis
The single strand of the acid fast bacteria, mycobacterium tuberculosis